Switch mounting



Patented Jan. 20, 1931 UNITED STATES CHARLES HENRY BABNARD, OI CHICAGO,ILLINOIS,' ASSIGNOR '10 WESTERN ELEC- PATENT OFFICE,

TRIO COMPANY, INCORPORATED, OF NEW YORK, N. Y., A CORPORATION OF NEWYORK swrrcn Moim'rnm Application filed May 10, 1928. Serial110.878,!540;

This invention relates to mounting and more particularly to mountingsfor telephone switch keys.

In the manufacture of metal articles it is well known that some articleswhich are formed from sheets of metal by means of a punch press are moreeconomical to manufacture than articles of the same type which have beencast. In the past mountings for telephone keys have in some instancesbeen cast from brass or like metal, or made up from a number of partseither welded or secured together by screws or bolts.

The object of this invention is to provide a unitary key mounting whichmay be cheaply manufactured and which will at the same time have greatstrength, rigidity and simplicity of structure.

In accordance with one embodiment of this invention there is provided akey mounting which may be completely formed on a punch press from sheetmetal. The mounting is made up of a top portion slotted to receive keylevers and having a reinforcing flange on the one side and a web on theother side thereof. The web has an offset portion and has rectangularopenings formed at intervals therein in which the springs of the keys ofthe switches may be positioned. The top portion also has end portionsupon which lugs are formed by means of which the key mountings may besecured in a switchboard or other apparatus.

This and other objects of the invention will be apparent from thefollowing detailed description and accompanying drawing of oneembodiment of the invention, wherein,

Fig. 1 is a plan view showing the key mounting having one key mountedtherein,

Fig. 2 is a side elevational view thereof, and,

Fig. 3 is an end elevational view thereof.

Referring to the drawing in which like reference characters designatelike parts throughout the various views, the numeral 10 designatesgenerally the framework or mounting upon which a switch generallydesignated 11 having an operating lever 12 is mounted. The mounting 10which preferably is formed from a single sheet of metal comprises a flattop portion 14 having a flange 15 formedon one side thereof and a web 16formed on the other side thereof. End portions 18..18 which haveintegral A mounting lugs 19-19 extending laterally therefrom are alsoprovided at each end of the top portion 14. The lugs 1919 have holes2020 formed therein designed to hold screws (not shown) by means ofwhich the key mounting may be secured in the telephone apparatus (notshown) with which it is to be associated. The web 16 has rectangularopenings 2222 formed therein in which an assembly of contact springs ofan ordinary type generally designated 25, of the switch 11 may bepositioned. The web 16 also has a portion 23 thereof which is offsetangularly and inwardly at a point intermediate its ends to substantiallythe center of the mounting and which continues from that point in aplane at right angles to the top portion 14 to its extremity. Theassembly of contact springs 25 of the switch 11 may be mounted on eachside of the offset portion of the web 16 immediately below the center ofthe opening 22. The lever 12 for operating the switch is movablypositioned in slots 2727 formed in the top portion 14 by means of pins28-28 rotatably mounted in the flange 15 and the web 16.

The switch may be operated in the usual manner by moving the key lever12 to either the right or the left (Fig. 2), but inasmuch as the switchand spring combinations there- V of form no part of this invention it isdeemed unnecessary to give herein a full description of the structureand operation thereof.

The key mounting described hereinbefore may be formed from one piece ofmetal by a.

on both sides thereof thus permitting a great variation in springcombinations.

lVhat is claimed is:

1. A unitary electrical key switch mounting, comprising a flat topportion, a reinforcing flange portion, a web portion, and end portionshaving mounting lugs formed thereon. V V

2. A unitary electrical key switch mounting, comprising a flat topportion, a -reinforcing flange,end portions upon which are formedmounting portions, and a web eX- tending from and at right angles to thetop portion to a point substantially one-third its length and thencontinuing inwardly at an angle to substantially the center of themounting and then continuing in a plane at right angles to the topportion to its extrelnity.

In witness whereof, I hereunto subscribe my name this 25th day of AprilA. D., 1928.

CHARLES HENRY BARNARD.

